DETERMINATION OF THE BIMOLECULAR RATE-CONSTANT OF PHOTOINDUCED CHARGE SEPARATION IN THE ENERGY-GAP REGION WHERE THE REACTION IS DIFFUSION CONTROLLED - ANALYSIS OF THE TRANSIENT EFFECT IN THE COURSE OF FLUORESCENCE QUENCHING REACTION

被引:85
作者
NISHIKAWA, S
ASAHI, T
OKADA, T
MATAGA, N
KAKITANI, T
机构
[1] OSAKA UNIV, FAC ENGN SCI, DEPT CHEM, TOYONAKA, OSAKA 560, JAPAN
[2] NAGOYA UNIV, FAC SCI, DEPT PHYS, CHIKUSA KU, NAGOYA 46401, JAPAN
关键词
D O I
10.1016/S0009-2614(91)85054-Z
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The photoinduced intermolecular charge separation (CS) rate constant (k(CS)) at the encounter in acetonitrile solution has been evaluated for various donor-acceptor pairs by analyzing the transient effect in the fluorescence decay curves, in the energy gap gion -DELTA-G0 = 0.37-2.21 eV, where the reaction is diffusion controlled. Although the obtained k(CS) values are larger than the diffusion rate constant, they do not show the typical bell-shaped -DELTA-G0 dependence as observed in the charge recombination reaction of the geminate ion pairs produced by fluorescence quenching reaction, but show a rather flat shape.
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页码:237 / 243
页数:7
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